Returned error: Sender doesn't have enough funds to send tx when running offline transaction with web3

Question

I'm trying to run the javascript following code to make a transaction to a contract function offline against a Ganache blockchain but I get the following error: "Error: Returned error: sender doesn't have enough funds to send tx. The upfront cost is: 1 and the sender's account only has: 0"

(privateKey and publicKey are a Ganache account public/private keys).

I don't know why the script cannot figure out the sender account balance. Any idea?

Many thanks.

var myContract = new web3.eth.Contract(abi, contractAddress, {
  from: publicKey,
});
var data = myContract.methods.pickWinner().encodeABI();

web3.eth.accounts.signTransaction({
  data,
  gas: 1,
  gasPrice: 1
}, privateKey)
.then((res) => {

  web3.eth.sendSignedTransaction(res.rawTransaction, function(err, hash) {
    if (err)
      console.log(err);
    else
      console.log(hash);
  });

});

Answer 1

There was a known issue pertaining sendRawTransaction and ganache-cli v6.1.5. Upgrading to v6.1.6 should fix your issue. If you're using the GUI then upgrade to 1.2.1 which contains the aforementioned fix (https://github.com/trufflesuite/ganache/releases/tag/v1.2.1)

Answer 2

I also had the same error. I was able to solve it by changing the mnemonic in my truffle-config.js to match the mnemonic given by Ganache CLI.

Because each time you run Ganache, the mnemonic changes. but you have to remember to change it in your config file to access the funds in the correct account